Angular JS: techniques for retrieving a single record from a JSON data set

I have a set of JSON data, which is an array consisting of 50 objects representing individuals. Each object contains specific parameters like id and lastName.

In my controller, I retrieve this data using a resolve called EmployeeResolve and store it in a variable named _this.employees.

Furthermore, I also obtain a rowNumber variable from the $state parameters of the previous page, which stores the ID of the record that the user clicked on: _this.rowNum = $stateParams.id;. Let's assume the id is 5.

My objective now is to assign the fifth object (for lack of a better explanation) to a variable so that I can bind it in my HTML using something like {{controller.lastName}}

What would be the correct syntax for retrieving the fifth item from the employees array?

UPDATE After receiving several helpful comments and answers, I have made progress (now referring to people as packages):

_this.recordNum = Number($stateParams.id);
  _this.packages = PackagesResolve;

  _this.currentPackage = _this.packages.filter(function(pkg) {
    return pkg.id === _this.recordNum;
  });

  $log.debug('package from filter', _this.currentPackage[0].status);

However, contrary to my expectations, when accessing _this.currentPackage, it does not contain an object. It appears to be a resource, requiring me to use _this.currentPackage[0].status as shown in the log statement. Unfortunately, this method doesn't allow for direct binding.

A colleague proposed adjusting my resolve function as follows:

PackagesResolve: function($log, MockDataFactory) {
      return MockDataFactory.query({filename: 'packages'}).$promise.then(function(response) {
        return response;
      });
    }

Even with this modification, there seems to be no noticeable change.

To clarify my goal:

The PackagesResolve function retrieves a JSON array containing 50 objects. My aim is to access the current object when its corresponding row in a table of JSON data is clicked.

It should be noted that this issue cannot be resolved using jQuery or vanilla JavaScript; Angular is the preferred framework for this task.

Answer №1

If I understand your issue correctly: the object that is returned by resolve represents the resolved promise. The "data" within the resolved promise, which in this scenario would contain an array of people information, can be found inside resolve.data. So if you have a resolve named EmployeeResolve, you can access and save the array like this:

Modifying based on feedback:

// Assuming all error handling has been done...
_this.employees = EmployeeResolve.data;

// At this point, _this.employees holds the array of people information.

$scope.controller = {};
$scope.controller.variableName = _this.employees[$stateParams.id];
// Now, the object can be accessed in your template using controller.variableName.

While I wouldn't suggest keeping code like this in your final version, I trust you grasp the concept. ;)

Additional information: I am creating an empty object and storing it as controller on the scope because your query specified it. I assume you have your own reasons for wanting to namespace your variable under controller.

I hope this clarifies things for you!

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